Andy K's recently been posting 'Cragsmanship' articles, which contain some really useful info for climbers. Some are quite in depth, but there's also some really useful basic hints, tips and safety advice.
It's well worth having a look through them.
http://andy-kirkpatrick.com/cragmanship
Andy Kirkpatrick - climbing technique, gear and theory
Re: Andy Kirkpatrick - climbing technique, gear and theory
A good one on indoor belaying techniques here from Andy: http://andy-kirkpatrick.com/cragmanship/view/holding_on
Marq
Marq